An equivalent of the server side code FindItemByValue("ItemText").Selected=true
(as I assume it is the one that you are using)
would be a findItemByValue("ItemText").set_selected(true);
exemplified in the following two articles - RadMenu object
and RadMenuItem object
. Give it a try and let me know if this helps in getting the desired scenario.
the Telerik team
If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to their blog feed